## Definition of Ordinal Numbers

Ordinal numbers are used to describe the position or order of objects or events in a sequence. These numbers are written in a specific format, such as “1st,” “2nd,” “3rd,” “4th,” and so on. The first ten ordinal numbers are usually spelled out in full, while higher numbers are written using a combination of numbers and letters.

## Real-life Examples of Ordinal Numbers

- Olympic Medal Ranking
- Classroom Seating Arrangement
- Race Finishing Positions:
- Apartment Floor Numbers
- Birth Order

## Difference Between Cardinal and Ordinal Numbers

Cardinal numbers are used to** represent the quantity or number of objects** in a set.

**For example,** if there are five apples in a basket, we say that the cardinality of the set of apples is five.

Cardinal numbers can be used for counting, measuring, and comparing quantities. They include numbers such as 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, and so on.

Ordinal numbers, on the other hand, are used to **represent the position or order of objects** in a series or sequence.

**For example,** if you are running a race and you finish in second place, your ordinal rank is 2nd.

Ordinal numbers are written in a specific format, such as “1st,” “2nd,” “3rd,” “4th,” and so on. They indicate the order of things and their position in a sequence.

## List of Ordinal Numbers from 1 to 100

Number | Ordinal | Number | Ordinal | Number | Ordinal |
---|---|---|---|---|---|

1 | 1st | 21 | 21st | 41 | 41st |

2 | 2nd | 22 | 22nd | 42 | 42nd |

3 | 3rd | 23 | 23rd | 43 | 43rd |

4 | 4th | 24 | 24th | 44 | 44th |

5 | 5th | 25 | 25th | 45 | 45th |

6 | 6th | 26 | 26th | 46 | 46th |

7 | 7th | 27 | 27th | 47 | 47th |

8 | 8th | 28 | 28th | 48 | 48th |

9 | 9th | 29 | 29th | 49 | 49th |

10 | 10th | 30 | 30th | 50 | 50th |

11 | 11th | 31 | 31st | 51 | 51st |

12 | 12th | 32 | 32nd | 52 | 52nd |

13 | 13th | 33 | 33rd | 53 | 53rd |

14 | 14th | 34 | 34th | 54 | 54th |

15 | 15th | 35 | 35th | 55 | 55th |

16 | 16th | 36 | 36th | 56 | 56th |

17 | 17th | 37 | 37th | 57 | 57th |

18 | 18th | 38 | 38th | 58 | 58th |

19 | 19th | 39 | 39th | 59 | 59th |

20 | 20th | 40 | 40th | 60 | 60th |

☛ **Related Topics**

- Cardinal Numbers
- Numbers
- Rational Numbers
- Prime Numbers
- Composite Numbers
- Even Numbers
- Odd Numbers
- Real Numbers
- Natural Numbers
- Irrational Numbers
- Counting Numbers

## Ordinal Numbers Examples

**Example1: John finished the race in 1st place.**

The ordinal number is “1st” indicating the position of John in the race.

**Example2: Today is the 5th of June.**

**Example3: The ordinal number is “5th” indicating the date in the month of June.**

The 3rd book on the shelf is my favorite.

**Example4: The ordinal number is “3rd” indicating the position of the book on the shelf.**

She is the 2nd student to present her project.

**Example5: The ordinal number is “2nd” indicating the position of the student in presenting the project.**

We will be staying on the 7th floor of the hotel.

The ordinal number is “7th” indicating the floor number in the hotel.

### FAQs on Ordinal Numbers

**Q: What are ordinal numbers?**

A: Ordinal numbers are the numbers used to indicate the position or order of something in a series or sequence.

**Q: How are ordinal numbers written?**

A: Ordinal numbers are typically written with a suffix that indicates the position or order of the number. For example, “1st” is the ordinal form of “1,” and “2nd” is the ordinal form of “2.”

**Q: What is the difference between cardinal and ordinal numbers?**

A: Cardinal numbers are used to denote the quantity or number of objects or things, while ordinal numbers are used to denote the position or order of objects or things.

**Q: What is the rule for forming ordinal numbers?**

A: The rule for forming ordinal numbers is to add a suffix to the cardinal number. For example, adding “-st” to “1” gives “1st,” adding “-nd” to “2” gives “2nd,” and so on.

**Q: How are ordinal numbers used in sentences?**

A: Ordinal numbers are used in sentences to indicate the position or order of something in a series or sequence. For example, “John came in 3rd place in the race” indicates that John finished in the third position in the race.